The True Heiress Is an All-Powerful Bigshot

A highly skilled fighter wakes up in someone else's body and discovers that she's the Huffmans' lost daughter Gemma, regarded as socially inferior to her adoptive sister and a human punching bag for her Aunt Elodie. Her father doesn't care about her. Her mother is ashamed of her. Just when everyone thinks Gemma is going to make a complete fool of herself, they get a slap in the face.